Preparation of Nanometer Sized Cuprous Oxide and its Photocatalytic Performance over Four Nitrophenol

2013 ◽  
Vol 333-335 ◽  
pp. 1853-1856
Author(s):  
Yu Liang
Keyword(s):  
Particle Size ◽  
Photocatalytic Activity ◽  
Small Particle ◽  
Cuprous Oxide ◽  
Photocatalytic Performance ◽  
Reducing Agent ◽  
Spectral Features ◽  
Small Particle Size ◽  
Traditional Methods ◽  
Excellent Photocatalytic Activity

Nanometer sized Cu2O is synthesised by nucleation crystallization separation and redox methods, with NaBH4 as reducing agent. It takes several researching methods, such as XRD,SEM,EDS and UV-vis, etc, to study the structure, composition and spectral features of the product. The results show that, comparing with traditional methods, the Cu2O particles produced by nucleation crystallization separation and redox methods have following features: similar appearances, small particle size, and narrow distribution, etc. The photocatalytic experiment shows that, this kind of Cu2O has excellent photocatalytic activity over four nitrophenol.

scholarly journals PREPARATION OF CUPROUS OXIDE NANOPARTICLES USING ASCORBIC ACID AS A REDUCING AGENT AND ITS PHOTOCATALYTIC ACTIVITY

2019 ◽  
Vol 128 (1D) ◽  
Author(s):  
Dang Xuan Du ◽  
Pham Thi Giang Anh
Keyword(s):  
Particle Size ◽  
Ascorbic Acid ◽  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Cuprous Oxide ◽  
Reducing Agent ◽  
Degradation Ratio ◽  
Ft Ir ◽  
Acid Reduction

<p>In this present paper, cuprous (Cu<sub>2</sub>O) nanoparticles were successfully fabricated by using ascorbic acid as a reducing agent. The purity and characteristics of Cu<sub>2</sub>O nanoparticles were determined by XRD and FT-IR methods. The morphology and particle size of the material were determined by SEM, TEM, respectively. The results showed that the concentration of sodium hydroxide was effective in the morphology and particle size of the material. Furthermore, the Cu<sub>2</sub>O nanoparticles with particle size of 70-80 nm exhibited a good photocatalytic activity on photodegradtion of Rhodamine B by visible light, and the photocatalytic degradation ratio of Rhodamine B attained to 70%.</p><p>Keywords: couprous nanoparticles, ascorbic-acid reduction, photocatalytic degradation, photocatalytic activity, Rhodamine B.</p>

Dose schedule of Rasa Aushadhis

2016 ◽  
Vol 1 (2) ◽  
Author(s):  
Dr. Jambla Neha ◽  
Saroch Vikas ◽  
Johar Smita
Keyword(s):  
Particle Size ◽  
Oral Mucosa ◽  
Small Particle ◽  
Dose Schedule ◽  
The Body ◽  
Small Particle Size ◽  
Inherent Property ◽  
Ayurvedic Drugs ◽  
Modern Era

Rasashastra deals with the Rasa Aushadhis, the drugs of metallic and mineral origin. Mercury is used in most of the Rasaaushadhis. The toxicity of Mineral and metallic preparations are reduced to such an extent by various procedures of Shodhana, Marana etc. that Mercury converts its inherent property of toxicity into medicinal property. Rasa Aushadhis works quickly on the body because due to their small particle size, their absorption starts from the oral mucosa itself. The action of drugs depends largely upon the Anupana i.e. the vehicle for the drug. Rasacharayas have mentioned various Rasa preparations like Bhasmas, Parpati, Pottali, Manduras, Karpooras etc. along with their doses, dose schedule and Anupana / Sahapana etc. The principles of Rasaaushadhis when correlated in modern era are found to be scientifically accurate. We may say that Rasacharyas had already mastered the science of nanotechnology, purification, action of metabolic catalysts, biotransformation and preservation of medicines. The Ayurvedic drugs can be harmful for our body when not administered in proper dosage as per mentioned in classic literatures.

scholarly journals Design and characterization of oil-in-water nanoemulsion for enhanced oil recovery stabilized by amphiphilic copolymer, nonionic surfactant, and LAPONITE® RD

RSC Advances ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 1952-1959
Author(s):  
Yi Zhao ◽  
Fangfang Peng ◽  
Yangchuan Ke
Keyword(s):  
Particle Size ◽  
Nonionic Surfactant ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Small Particle ◽  
Amphiphilic Copolymer ◽  
Good Stability ◽  
Small Particle Size ◽  
Oil In Water

Emulsion with small particle size and good stability stabilized by emulsifiers was successfully prepared for EOR application.

Synthesis of Red-Emitting, Small Particle Size Luminescent Oxides Using an Optimized Combustion Process

1996 ◽  
Vol 79 (12) ◽  
pp. 3257-3265 ◽  
Author(s):  
Lauren E. Shea ◽  
Joanna McKittrick ◽  
Olivia A. Lopez ◽  
Esther Sluzky
Keyword(s):  
Particle Size ◽  
Small Particle ◽  
Combustion Process ◽  
Small Particle Size

Aluminate Green Phosphor with Small Particle Size Used for PDP via Co-Precipitation Method

2011 ◽  
Vol 295-297 ◽  
pp. 890-895
Author(s):  
Yan Dong ◽  
Yang Zhou ◽  
Xue Lin Han ◽  
Wei Jie Gu
Keyword(s):  
Particle Size ◽  
Phase Transformation ◽  
Small Particle ◽  
High Efficiency ◽  
Particle Growth ◽  
Solid State Reaction Method ◽  
Precipitation Method ◽  
Small Particle Size ◽  
Green Phosphor ◽  
Co Precipitation

Mg doped BaAl12O19:Mn2+ phosphor is one of the most efficient green phosphors for PDP. It is difficult to prepare the phosphor both have small particle size (< 3μm) and high luminescence. In the present work, a BaAl12O19:Mn2+ phosphor with small particle size was synthesized by the chemical co-precipitation method. Phase transformation and particle growth process during calcining process were investigated. The nucleation process was also discussed. The results show that, the phase transformation is complicated, the transition phases include BaCO3, γ-Al2O3, BaF2, BaAl2O4 and two phases contain Mn; The BaAl12O19 phase is formed from the reaction between BaAl2O4 phase and γ-Al2O3 phase, no a-Al2O3 phase appears during the entire process; The formation temperature of pure BaAl12O19 phase is 1200°C, which is lower than that in the high-temperature solid state reaction method. High efficiency BaAl12O19:Mn2+ phosphor with small particle size (< 2μm) and hexagonal flaky shape can be prepared by this method.

Sign in / Sign up

Export Citation Format

Share Document